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A146917 Number of n X n binary arrays with all ones connected only in a 0110-1111-0110 pattern in any orientation. 0
1, 1, 1, 5, 13, 33, 189, 1504, 14808, 192345, 3378235, 83510270, 2816813223, 127717175896, 7956430608952, 672733591665214, 77219550936345236 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Maximal 8 X 8 example

.0.1.1.0.0.0.1.0

.1.1.1.1.0.1.1.1

.0.1.1.0.0.1.1.1

.0.0.0.0.0.0.1.0

.0.1.0.0.0.0.0.0

.1.1.1.0.0.1.1.0

.1.1.1.0.1.1.1.1

.0.1.0.0.0.1.1.0

CROSSREFS

Sequence in context: A146621 A147086 A032406 * A283329 A201170 A106587

Adjacent sequences:  A146914 A146915 A146916 * A146918 A146919 A146920

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified April 3 15:51 EDT 2020. Contains 333197 sequences. (Running on oeis4.)